I know a very respected doctor who, after years of trying to deal with his schizophrenic son -- and having called the police many times to deal with potentially violent situations -- finally came to the realization that he had to close the doors permanently on his son. He simply could not risk the lives of his wife and other family members any longer. Evidently there were very few services available for his son, and no way to coerce his son into accepting those services. (I guess "being committed to a mental hospital" just doesn't happen anymore).
Committment for in-patient mental health treatment requires the patient to agree to that committment. Gone are the days when family could turn over an unwilling patient to a facility for treatment (this was a civil rights issue embraced by then-Governor Ronald Reagan that drastically reduced mental health beds in California). Nowadays, police and medical personnel can place a 5150 hold on individuals who appear to be a danger to themselves or others. This allows for a 72-hour hold in a psych facility to monitor the patient. However, anyone with mental health issues to the extent that they've been 5150'd knows how to answer the questions to get released at the end of the 72 hours. Seventy-two hours is not long enough for any psychotropic drugs/counseling to have an impact and allow the patient to get a sense of his/her problems to then agree to continued care. And because so many mental health issues are associated with or exacerbated by substance abuse, these people are more than anxious to get out and "self-medicate" in their own fashion.
There are resources out there for mental health care, however, they require a willing patient. You can lead a horse to water...........